Old Thermostat Wiring Color Code

The 5 strands of wire provide enough functions for the modern. Well explained tutorial on wire color codes. G fan usually a green wire r 24 vac usually a red wire rc and rh are discussed later c 24 vac common y compressor usually a yellow wire w heat usually a white wire.

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The main difference setting each apart is the number of colored wires.

Old thermostat wiring color code. To install a new thermostat or repair an existing device you ll need to understand the different colors of wires. It is a red wire and comes from the transformer usually located in the air handler for split systems but you may find the transformer in the condensing unit. There are a variety of thermostat wire types. I explain what each of the letter terminals are for the voltage path how it works and also the normal color code used.

This article explains just what wire at a room thermostat actually controls. The usual terminals are. Below is an industry standard thermostat wire color code complete with each wire s function. Well explained tutorial on wire color codes.

The most common is 18 5 5 strand 18 gauge. Color of wire and termination. Tuned the targeting for honeywell thermostat wiring color code deleted ad scripts added more related posts links and added tags. I discuss how to wire the contactor and what the difference is between the.

Heat pumps use staging for auxiliary heat and need a w2 terminal the most common color ive seen used for this terminal and wire designation is brown but this varies and is completely up to the installer what color to use. Types of thermostat wire. R the r terminal is the power. Lately the company that makes thermostat wire changed the colours around so older homes have the colours above but if you bought a spool of thermostat wire lately its going to be red white orange green blue are the new colours.

Thermostat wiring and wire color chart thermostat wiring colors code. Knowing what each thermostat wire does can help in wiring up a new or replacement room thermostat. The thermostat wiring color code guide from wi fi thermostat reviews. How to wire a thermostat.

This data can also be helpful if thermostat wires have become mixed up or improperly color coded by allowing you to trace wires back to their control connection point. This is often referred to as a 1h 1c conventional thermostat terminal designations. Skip navigation sign in. Each wire connects to a different terminal and is responsible for a different function.

Hvac systems with more functions need more wires to communicate to and from the thermostat. Heat pump thermostat wire color code duration. Thermostat wire reference chart. For the thermostat wiring colors code for this terminal if equipped consult with the installer or trace the wire out to.